Paint Grade CMC is a water-soluble thickener and dispersant used in aqueous paint formulations.
| Quantity: | |
|---|---|
It controls viscosity, prevents pigment settling during storage, and enhances application performance—ensuring smooth, uniform coverage and a high-quality finish. This grade improves paint stability (reducing separation) and minimizes splattering during brushing or rolling, making it suitable for architectural, industrial, and decorative paints.
Parameter | Specification |
Appearance | White powder |
Viscosity (2% solution, 25°C) | 30000–60000 cP |
Degree of Substitution (DS) | ≥0.95 |
Purity | ≥95% |
pH Value (1% solution) | 6.5–8.5 |
Moisture Content | ≤10% |
High Thickening Efficiency: Low dosage (0.5–2% by weight) achieves the desired viscosity, significantly reducing formulation costs.
Long-Term Storage Stability: Prevents pigment settling for up to 6 months in sealed containers, eliminating the need for re-stirring before use.
Improved Application Workability: Reduces brush drag and splatter during application, making it easier to achieve even coverage.
Uniform Film Formation: Enhances paint leveling, minimizing brush marks, roller stipple, and surface irregularities.
Architectural Paints: Used in interior and exterior wall paints to control viscosity and improve finish uniformity.
Decorative Paints: Enhances color consistency in latex and acrylic-based decorative coatings (e.g., furniture paint, craft paint).
Industrial Paints: Stabilizes formulations for metal, wood, and plastic substrates, improving durability and corrosion resistance.
Q: Can Paint Grade CMC be used in high-gloss paint formulations?
A: Yes, its high purity (≥95%) ensures it does not compromise the gloss or clarity of the final finish.
Q: How does Paint Grade CMC perform in low-temperature conditions (e.g., winter production)?
A: It readily dissolves in cold water (≥10°C), maintaining consistent performance and making it suitable for year-round production.
Application in Regular Coatings
The hydroxyl-rich polymer chains of CMC hydrate with water and intertwine, enhancing the viscosity of the aqueous phase. Its excellent compatibility with water-based coating systems significantly improves the viscosity and rheology of coatings. When used in water-soluble coatings, CMC delivers the following benefits:
1. Superior water resistance and long-lasting film durability;
2. High film fullness with uniform distribution, achieving high-gloss effects;
3. Acts as a stabilizer to prevent film separation caused by sudden temperature changes;
4. Functions as a protective colloid, maintaining system stability across a broad pH range;
5. Serves as a thickener to ensure uniform coating distribution, optimize storage and application viscosity, and prevent phase separation;
6. Enhances leveling properties, anti-splash, and anti-sagging performance, improving construction workability;
7. Promotes homogeneous dispersion of pigments and fillers, delivering excellent pigment adhesion.
Application in Latex Paints
Latex paint primarily consists of polymer aqueous dispersions and pigment aqueous dispersions. Its viscosity directly impacts sedimentation, brushability, roll-coating performance, film fullness, and sagging on vertical surfaces. CMC, with its superior rheological properties, low brush resistance, and ease of application, is employed as a stabilizer, thickener, and water-retention agent.
1. Efficient thickening of latex paint with notable viscosity enhancement;
2. Strong stability, maintaining consistent viscosity and residue-free storage;
3. Controls moisture release on porous substrates and retains water under high latex content;
4. Broad compatibility with formulations, minimally affected by emulsion types, dispersants, or surfactants;
5. Terminates aqueous interactions post-application, restoring viscosity to prevent sagging.
Application in Casting Paints
CMC, a multi-chain macromolecular compound, swells in water to form an interlinked network structure through linear chain expansion. It synergizes with sodium bentonite to enhance suspension capacity, reduce sediment agglomeration, and prevent fire-resistant aggregates from settling. It is widely used to improve the suspension rate and viscosity control of casting paints.
1. Superior water-soluble thickening properties, optimizing coating viscosity and rheology;
2. Excellent solubility and dispersion, ensuring solid particles remain suspended in the carrier liquid;
3. Forces fire-resistant powders to suspend, preventing sedimentation and excessive liquid penetration;
4. Enhances coating spreadability and coverage, improving brushing and leveling performance;
5. Post-drying, particles bond firmly, adhering tightly to the mold’s inner and outer surfaces.
Type | Viscosity (mPa.s, 25 ℃) | pH | Degree of Substitution (DS) | Purity% | Moisture% |
C600R | 1%, 500-800 | 6.5-8.5 | ≥ 0.9 | ≥ 95.0 | ≤ 10.0 |
C1000R | 1%, 800-1500 | 6.5-8.5 | ≥ 0.9 | ≥ 95.0 | ≤ 10.0 |
C2000R | 1%, 1800-2800 | 6.5-8.5 | ≥ 0.9 | ≥ 95.0 | ≤ 10.0 |
C3000R | 1%, 2800-3500 | 6.5-8.5 | ≥ 0.9 | ≥ 95.0 | ≤ 10.0 |
C4000R | 1%, 3500-4500 | 6.5-8.5 | ≥ 0.9 | ≥ 95.0 | ≤ 10.0 |
C6000R | 1%, 5500-6500 | 6.5-8.5 | ≥ 0.9 | ≥ 95.0 | ≤ 10.0 |
